Generator for liquid-fuel burners.



A. H. 6L D, E. MIESS.

GENERATOR FOR LIQUID FUEL BURNERS.

APPLICATION FILED JULY 24.1917.

Patented Apr. 30, 1918.

2 SHEETS-SHEET I.

//2 van fora A. R. & D. E. MIESS.

GENERATOR FOR LIQUlD FUEL BURNERS. APPLICATION FILED JULY 24, I917.

Patented Apr. 30, 1918.

2 SHEETS-SHEET 2- i To all whom it may concern:

A UNITED STATES PATENT OFFICE.

ALVYN BGDR'A MIESS AND DANIEL E. MIESS, 0F CO'V'IITA, CALIFORNIA.

GENERATOR FOR LIQUID-FUEL BUBNEBSQ Application filed July 24, 1917. Serial No. 182,540..

Be it known that we, AL DANIEL E. Mmss, citizens of the United States, and both residing at Corina, in the county of Los Angeles, State of California, have invented new and useful Improvements in Generators for Liquid-Fuel Burners, of which the following is a. specification.

This invention relates to generators for liquid fuel burners; and relates particularly to means for generating and starting burners which use petroleum distillate or the like for fuel, requiring gasification of the fuel before the burner "can start its nor mal operation. After the burner is in operation the heat from the burner flame serves to thereafter vaporize and gasify the fuel.

It is a particular object of this invention to provide a simple, economical and easily applied means for generating and starting such a burner; and in accomplishing this object we have provided, an electrical means of generating the burner, of initially vaporizing and gasifying the fuel. In a burner equipped with a generator according to our invention, the electric current is turned on for a minute or so before the fuel is ad-.

mitted to the burner. The electric current gasifying temperature; and the fuel, when it is admitted, comes into contact with the heated surfaces and is immediately vaporized and then burned. Once the vapors are ignited, then suflicient heat is had therefrom to keep up the vaporization.

In the following specification we describe several embodiments of our invention, in.

specific preferred forms; and for this purpose we refer to the accompanying drawings in which Figure 1 is a vertical central section of a burner equipped with a preferred form of our invention; Fig. 2 is a reduced plan showing the burner equipped with another form of our invention; Fig. 3 is a central vertical section showing the burner equipped with another form of our invention; an Fig. 4: is a reduced plan showing the same form as shown in Fig. 3. p

In the drawings we illustrate our invention as applied to a burner of a particular type. Although we find-this tytp: of burner to be particularly eflicient, and p d our generator to be well combined with this burner; -yetitwillbennderstoodthatwedonot Specification of I.etters latent.

R. Mmss and.

Patented Apr. 30,1918.

limit our invention to the application of it with this particular type of burner. From the following description it will be readily understood how our generator is applicable and how it may be applied to burners of types different from that particularly herein illustrated.

We illustrate a. g 10 with a vertical passage'll leading upwardly through the body. The body 10 is.

A T-shaped mixing tube 17 fits into the lower end of passage 11, the two opposite ends 18 of the tube 17 being open to atmosphere. A fuel nozzle 19 projects into the mi g' tube 17 to project the fuel in a jet into the mixing tube. The fuel is projected "up through the passage 11, drawing air through the openings 18, and the mixed air burner comprising a body to burners of the general class described,.

and vaporized fuel pass up against the de- 1 flector 16 andthen down under the wall 15 and then down next to the ring 13 and through its perforations. Here the mixed air and vapors are burned in a flame extending completely around the burner.

In this preferred form of burner, a retort tube 20 is carried in brackets 21 around the burner. Tube 20 is bent to circular forma-' tion and is supported in such a position around the lower part of the burner that it receives just a suitable quantity of heat to properly vaporize the liquid fuel. The liquid fuel enters at 22 andpasSesaround through the retort tube 20 and then (see Fig. 2) passes down through an extension 23 to the member 2; which carries the fuel nozzle 19.

In the usualform of burner, the tube and then over the upper edge of the wall 12 20 is filled with strands of cable, as illusmore readily heated and vaporin thin layers through the tube,

. the part '23 and the nozzle 19. This retort 3O preferably comprises an outer tube 31 containing an inner tube 32 of slightly less diameter. The inner tube 32 iswound with a cable strand 33, and then the expanded ends 3st of the inner tube are brazed or otherwise connected to the ends of the outer tube 31. The tube 23 enters the annular space between the tubes 31 and 32 and the member 24 communicates also with this space. The liquid fuel flows into this annular space atone end, and the gases flow out to the nozzle 19 near the other end of the annular space. The nozzle 19 need not connect at the end of the retort: it may connect nearer the center, The space between the nozzle connection and the retort end may become. a pressure regulating space. e provide an electric heating element 35. preferably in the form of a coil of resistance wire. within a tube 36 which is slipped into place in the inner tube 32, so as to be easily removable therefrom for substitution or repairs. The tube 36 may be of any suitable electric insulating and heat resisting material; .we now use a glass tube. The resistance wires may be led out to connecting wires 37. in any desired manner; we have shown the wires 3? simply being setin plugs 35 of some cementitious material, closing the ends of the tube 36.

, Fig. 1 shows an actual construction now in use. showing the arts in approximately full size. We have ound that wecan generate and start the burner by one and a half minutes previous electrical heating. The current is turned into the coil 35 for about that length of time. and the liquid fuel is then admitted to the retort. pas ing over the heated surfaces in the retort. 30, and being thereby vaporized. so that the vapors may be immediately ignited at the burner ring 13. The current is turned off as soon as the liquid fuel is initially vaporized; and vaporization of the fuel is. then carried on in the retort 20. e

The foregoing described form of our invention is a simple and convenient one, being simple and inexpensive to manufacture, durable and safe in use, and easy to repair or replace. If the electrical resistance is damaged. the tube 36 may be easily taken out and a new one put in place.

-The following described forms of device also embody and'illustrate our invention. In Fig. 2 we show a form of device wherein the coil of resistance wire 35 is inclosed within a tube 36" and is placed around the exterior of the retort tube 20. For instance, the coil 35 may be putinto an asbestos tube 36; and this asbestos tube may be extended along the tube 20. and also along the part 23. This form of device we have found effective.

In Figs. 3 and i we illustrate a form of device wherein the coil of resistance wire run through all three of the specific forms.

herein described; that the fuel is heated electrically, by an electrical heating element placed adjacent the fuel retort. Preferably, the heating element. is placed within the retort; in such a position itgives greater heating efiiciency and is protected against, injury. In the particular form of Fig. 1, the straight shape of the heating element. facilitates its easy withdrawal for replacement or repairs. The form shown in Fig. 1 is also perhaps more easily manufactured than either of the other two forms.

Having described preferred forms of our invention, we claim. q 1. In a' device of the character described, an electrically heated retort comprising an outer tubular wall and an inner tubular wall between which the liquid fuel is passed, a. resistance inclosing tube removably placed within the inner retort wall, and an electrical resistance in said tube.

, '2. In a. device of the character described, an electrically heated retort embodying a retort tube. a heating element holding tube within the retort tube, and a liquid distributive filling in the space between the two tubes.

3. In a device of the character described, an electrically heated retort embodying a retorttube, a heating element holding tube within the retort tube. and a liquid distributive fillin in the space between the two tubes, said liquid distributive filling embodying strands of wire cable.

4. In combination with a liquid fuel burner having a fuel heating retort in which the fuel is normally vaporized by heat from the burner flame. a fuel nozzle through which the vaporized fuel is projected 1nto the burner; a straight retort tube forming a' communication between the burner retort and the fuel nozzle, an inner tube within the straight retort tube and attached to its ends, forming an annular fuel vaporizing space, a resistance containing tube within said inner tube, and an electrical resistance therein.

5. In combination with a liquid fuel burner having a. fuel heating retort in which the fuel is normally vaporized by heat from the burner flame. a fuel nozzle through which the. vaporized fuel is projected into the burner: 21 straight retort tube forming a communication between the burner retort and the fuel nozzle, an inner tube within the straight retort tube and attached to its ends, forming an annular fuel vaporizing space, a resistance containing tube within said inner tube, and an electrical resistance therein, the annular fuel vaporizing space being filled with strands of wire cable.

6. In combination with a liquid fuel burner having a fuel heating retort in which the fuel is normally vaporized by heat from the burner flame, a fuel nozzle through which the vaporized fuel is projected into the burner; a straight retort tube forming a communication between the burner retort and the fuel nozzle, an inner tube within the straight retort tube and attached to its ends forming an annular fuel vaporizing space, a resistance containing tube within said inner tube, and an electrical resistance therein, the resistance containing tube being of glass and, being loosely placed in said inner tube so as to be easily removable therefrom;

7. An electric heater for liquids, embodying an outer tube, an inner heating element holding tube, an electrical heating element therein, and there being a liquid passage space between the element holding tube and the outer tube.

8. An electric "heater for liquids, embody-- ing a tube, a member outside said tube and providing between said member and the tube a thin passage space for liquid, and aremovable heating element in the tube.

9. An electric heater for liquids, embodying a tube, a member outside said tube and providing between said member and the tube a thin passage space for liquid, a, removable element holding tube within said first mentioned tube, and a heating element in said element holding tube.

10. An electric heater for liquids, embodying a tube, a member outside said tube and providing between said member and the tube a thinpassage space for liquid, a liquid.

distributive filling in the said passage space, and a removable heating element in the tube.

11. An electric heater for liquids embodying a pair of concentric tubes with a thin liquid passage space between them, a liquid distributive fillin in said space, means to introduce and witildraw liquid to and from said space, and a removable heating element within the inner tube.

12. An electric heater forliquids embodying a pair of concentric tubes with a thin liquid passage space between them, a liquid distributive filling in said space, means to introduce and withdraw liquid to and from said space, and a removable heating element loosely placed within the inner tube.

13. An electric heater for liquids, embodying a pair of concentric tubes with a thin liquid passage space between them, a liquid distributive filling in said space, means to introduce and withdraw liquid to and from said space, one of said means communicating with said space at a point somewhat removed from the end thereof, and a removable heating element within the inner tube.

14. An electric heater for liquids, embodying a pair of concentric tubes with a thin liquid passage space between them, a liquid distributive filling in said space, means to introduce and withdraw liquid to and from 7 said space, one of said means communicating with said space at a point somewhat removed from holding tube loosely placed within the inner one of the concentric tubes, and a heating element in said element holding tube.

In witness that we claim the foregoing we have hereunto subscribed our names this 13th day of July 1917.

Y A. RODNA MIESS.

l). E. MIESS. Witness:

James T. BARKELEW.

the end thereof, an element. 

